Wiktionary
niedermayrite
n. (context mineralogy English) A rare monoclinic hydrated copper cadmium sulfate hydroxide mineral.
Wikipedia
Niedermayrite
Niedermayrite is a rare hydrated copper cadmium sulfate hydroxide mineral with formula: Cu Cd( S O)(O H)ยท4 HO. It crystallizes in the monoclinic system and occurs as encrustations and well formed vitreous blue-green prismatic crystals. It has a specific gravity of 3.36.
Niedermayrite was named for Gerhard Niedermayr (born 1941), an Austrian mineralogist. It was first described in 1998 from a mine in the Lavrion District, Attica, Greece. It is also reported from the Ophir District, Tooele County, Utah. The environment is in brecciated marble. The cadmium dominant analogue of campigliaite.